The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2009
Filed:
Sep. 24, 2004
Guy C. Fedorkow, Bedford, MA (US);
Kenneth H. Potter, Jr., Raleigh, NC (US);
Mark A. Gustlin, Campbell, CA (US);
Christopher J. Kappler, Waltham, MA (US);
Robert T. Olsen, Dublin, CA (US);
Guy C. Fedorkow, Bedford, MA (US);
Kenneth H. Potter, Jr., Raleigh, NC (US);
Mark A. Gustlin, Campbell, CA (US);
Christopher J. Kappler, Waltham, MA (US);
Robert T. Olsen, Dublin, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Presently disclosed is an apparatus and method for returning control of bandwidth allocation and packet scheduling to the routing engine in a network communications device containing an ATM interface. Virtual circuit (VC) flow control is augmented by the addition of a second flow control feedback signal from each virtual path (VP). VP flow control is used to suspend scheduling of all VCs on a given VP when traffic has accumulated on enough VCs to keep the VP busy. A new packet segmenter is employed to segment traffic while preserving the first in, first out (FIFO) order in which packet traffic was received. Embodiments of the invention may be implemented using a two-level (per-VC and per-VP) scheduling hierarchy or may use as many levels of flow control feedback-derived scheduling as may be necessitated by multilevel scheduling hierarchies.